Plastering machine



June 5, 1951 C; H, STANTQN 2,555,823

' PLASTERING MACHINE FiledJan. 21, 1947 3 sheets-shee't 1 June 5, 1951 c. H. STANTON PLASTERING MACHINE 3 Sheets-Sheet 2 Filed Jan. 21, 1947 INVENTOR. Char/es fi zan for. 2 M @a y im Affe/news June 5, 1951 `c. H. STANTON 2,555,823

PLAsTERiNG MACHINE Filed Jan. 21, 1947 3 Sheets-Sheet 5 IN V EN TOR. Char/e5 H. Szamon Patented June 5, 1951 UNITED `STA'IES PATENT OFFICE PLASTERING MACHINE Charles H. Stanton, Detroit, Mich.

Application January 21, 1947, Serial No. 723,221

(Cl. 'Z2- 130) 5 Claims. l

The present invention relates to new and useful improvements in machinesfor applying plas ter or similar substances in plastic form to the walls and ceilings of the rooms of a building.

It is the usual practice to apply plaster to the walls and ceiling of a room by manual labor; and which Ihas proven slow and `tedious with conn sequential heavy expenses.

Also, in many instances, the material is ap-` plied unevenly with the result that. the oompleted wall is unsightly.

Accordingly, it is an object oi the present inm venticn to provide a simple, eliicient and reliable device for economically and effectively applying plaster and similar plastic materialsl tothe surfaces of walls and ceilings of rooms and including a universally adjustable troweling device to which the material is fed from a hopper under control of the operator and providingmeans for rotating the trowelin'g device, whereby theplaster may be evenly and smoothly applied to the surfaces of a wall or ceiling.

An important object of the invention is to provide a portable machine of this character which may be easily andconveniently moved from place to place as the work progresses.

A still further object is to provide. a device of this characteror simple and practicalA construction, which is efcient and reliablein` operation, relatively inexpensive to manufacture, `and operate, and which otherwise isy well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more 'fully hereinafter described and claimed, reference being had to the accompanying drawing forming part hereof, wherein like numerals refer tolike parts throughout, and `in which:

Figure l is a side elevational view withparts broken away and shown in section.

Figure 2 is an end elevational view.

Figure 3 is a fragmentary side elevational view showing the machine in position for` applying plaster to a ceiling.

Figure 4 is a side elevational view showing the supporting jack for the outer end o the track` on which the machine is slidably mounted.

Figure 5 is an enlarged plan view oi the rotating troweling device.

Figure 6 is a side elevational view thereof. Fig. A'7 is an enlarged` fragmentary" sectional View taken on a line l-l of Figure 5.

Figure 8 is a; perspective view of one of `the troweling members.

Figure 9 is an elevational view, partly shown:

in section, of the adjustable sup-porting mechanisrn for the screw conveyor for the plasticmaterial `to` be conveyed to the traveling device.

Referring now to the drawings in detail, wherein for the purpose of illustration I have disclosed a preferred embodiment of the invention., the nurneral` 5 designates a I'lat truck body supported on casters or swivelly mountedwhcels t, the body having a post l rising fromv one `end thereof.

The wheels at the end of the body adjacentthe post 'i' are mounted for horiaontalswinging move ment by means of upstanding shafts journa-led in the body, the shafts at the opposite sides of the body being connected by a tie-rod- $3 for uniform turning movement of thewheels, andone of the shafts is provided with a handle Iii to manually turnfthe wheels for steering the truck in any desired direction.

A track I I is formed at one end with a slide I2 which is slidably mounted on the post l, as well as for horizontal swingingY movement on 4the post, the slide I2 being secured in its rotatably adjusted position on the post by means oi a conventional form `of locking `lever I3.

A cable Ill is attached at one end to the inner end of the track II and-extends upwardly over pulleys I5 journaled at the top of the post i to extend downwardly at the opposite sideof the post for winding on a drurn- I journaled in brackv ets Il projecting-fromthe slide I2. The drumL is provided with a crank handle I 8 for winding and unwinding the cable on the drum to raise and lower the track i l, the track being secured in its vertically adjusted position by means of a pawl and ratchet I9.

A carriage 20 is slidably mounted on the track II and includes inner and outer slides 2i and 22 slidably mounted on the track from which guides 23 project downwardly for sliding on a rod or lower rail 24 positioned under the track. I I.

A screw 25 is threaded through one of the guides 23 and is journaled in the outer end of the track and provided with a manipulating handle 25, the rotation of the screw moving the carriage 2!) horizontally on the track inwardly and outwardly thereof.

The outer end of the track projects beyond the body 5 of the truck and the lower rail 2li of the track at its outer end is provided with an attaching plate 2l to which the head 28 of a screw 3 is swung to the right or left of truck body 5, whereby to prevent the weight of the parts carried by the track il from upsetting the truck.

The carriage 20 includes a crank arm 32 pivotally connected at one end by a crank pin 32a to the upper end of the carriage for vertical swinging movement of the arm, the crank pin 32a of the arm being provided with a sprocket 33 operated by a chain 34 from a sprocket 35 and handle 36 mounted on the lower portion of the carriage 29, whereby an operation of the chain and sprocket will cause a vertical swinging movement of the arm 32. The arm is secured in its adjusted position by means of a conventional form of locking handle 3l having a lock screw 37a connected therewith which rengages the crank pin A screw conveyor 38 is pivoted on the upper end of the arm 32, by a second crank p-in 39, and secured in its pivotally adjusted position by means of a conventional form of locking lever 40 having a locking screw 49@L engaging the conveyor supporting crank pin 39 and being mounted for vertical swinging movement on the arm.

The conveyor 33 includes a tubular housing 4i in which a screw 42 is journaled, the rear end of the tube having a hopper or funnel 43 rising therfrom by means of which plaster or other plastic material may be supplied to the conveyor.

A gear 44 is secured to the rear end of the shaft of the screw 42 and is driven by a pinion 45 secured to the shaft 46 of an electric motor 47 mounted in a bracket 48 beneath the rear end of the conveyor 38.

A front screw conveyor section 49 of reduced diameter is sleeved on the tube 4l for rotation thereon and to which is attached alever 55. Conveyor 49 is releasably locked in pivotally-adjusted relation to the screw conveyor 38 by a springbiased latch construction 59a carried by conveyor 49. Lever 55 comprises means for turning the front conveyor section 49 about the aXis of the conveyor 38. The front section 49 also includes a screw I connected to the screw 42 for operation thereby. Thus, when a wall is to be plastered, front conveyor section 49 is in the Figure 1 position but is turned 90 to the Figure 3 position when a ceiling is to be plastered, as will appear hereinatfer.

A plaster-applying device is designated generally at 52 and includes a bowl-like head 53 having a throat 54 extending therefrom and connected to the outer end of the conveyor section 49 for positioning the head at one side of the conveyor and with the outer surface of the head in parallelism with the axis of the conveyor.

, A disc 54a is mounted for rotation at the open side of the head 53, a gasket or sealing ring 55 being positioned between the disc and the edge of the head. A shaft 51 is journaled in the head to which the disc 54a is attached by means of a set screw 5B. A worm gear 59 is secured to the rear end of the shaft which is operated by a worm 59 from an electric motor 6l supported on a bracket 62 attached to the front conveyor section 49.

The disc 54a is provided with a plurality of radially extending openings or apertures 63 and formed in the outer surface of the disc between each pair of the openings 53 is a radially elongated recess 94 having a troweling member 65 positioned therein.

The troweling member is preferably constructed of resilient sheet material, such as spring steel or the like and is rolled spirally and tapered toward, one end with its tapered end positioned inwardly in the recess 64 of the disc Elias-as indicated in Figure 5 of the drawings. The free edge 53 of the spirally rolled troweling member projects outwardly beyond the surface of the disc 54 and the troweling member is yieldably mounted in the recess 5ft of the disc by means of a coil spring 61, supported on a rod 5S extending longitudinally in the recess 54. One end of the spring 6'! is hooked into the disc 54a and the other in the troweling member 65, as clearly shown in Figure 7.

The electric motors 4l and 5| are controlled by means of switches 69 mounted on the carriage 20 and to which an electric cord 1) is connected leading to a suitable source of current, such as the outlet receptacle of a house circuit.

In the operation of the device the machine is moved into a desired position in a room to be plastered, and the track H vertically adjusted on the post l in accordance with the part of the wall or ceiling to which the plaster is to be applied.

The disc 54 of the plaster-applying device 52 is placed against the wall or ceiling and the plaster fed from the hopper 43 to the head 53, whereupon the plaster is extruded from the openings 63, and upon rotation of the disc 54, the troweling member will smooth the plaster. It it apparent that the foregoing structure permits the device to be moved longitudinally over a oor by means of the wheels E, while the crank arm 32 and the crank pins 32a and 39 permit vertical adjustment of the plastering head 52 so that two or more courses of plaster may be laid on a wall as the truck is moved back and forth. rThereafter, the track i l may be vertically adjusted on the posts l and the procedure repeated. Also, the crank arm 32 and the crank pins 32a and 39 permit a wide range of adjustment of the head 52 relative to the rest of the device whereby to.

permit the head 52 to reach into corners and other places diilicult of access. Obviously, the conveyor and the plastering head may be adjusted longitudinally on the track i I and the latter is swingable about the posts 1 to permit a great iiexibility of use of the device.

It is believed the details of construction, manner of use and advantages of the device will be readily understood from the foregoing without further detailed explanation.

It is to be understood, however, that even though I have herein shown and described a preferred'embodiment of my invention, the same isY susceptible of certain changes fully comprehended by the spirit of the invention as herein described, and the scope of the appended claims. Having thus described my invention, what I claim is:

1. A plastering machine, comprising a rotary disc, said disc being formed with a circular series of spaced and radially-extending recesses, a troweling member in each recess, each troweling member being a coil of sheet material including a trailing free edge extending outwardly of said disc, means for rotating said disc, said disc being formed with a circular series of spaced and radially-disposed plaster-eXtruding apertures therein, said apertures and recesses being disposed alternately on said disc, and means for extruding plaster through said apertures.

2. In a portable plastering machine, a mobile truck, a post xedly secured to said truck, a hori- Zontally disposed track having one endmounted on said post for sliding movement therealong,

means operatively connected to said post and track for effecting the sliding movement of said track to any select position along said post, a carriage positioned on said track and mounted on the latter for sliding movement longitudinally thereof, means operatively connected to said track and carriage for effecting the sliding movement of said carriage to any select position along said track, a screw conveyer including an outlet mounted on said carriage for vertical swinging movement relative thereto, and a plaster applying head carried by said conveyer and in communication with the outlet end thereof.

3. In a portable plastering machine, a mobile truck, a post Xedly secured to said truck, a hori- Zontally disposed track having one end mounted on said post for sliding movement therealong, means operatively connected to said post and track for effecting the sliding movement of said track to any select position along said post, a carriage positioned on said track and mounted on the latter for sliding movement longitudinally thereof, means operatively connected to said track and carriage for effecting the sliding movement of said carriage to any select positon along said track, a screw conveyol` including a tubular housing open at one end and a hollow open ended section -having one end connected to said one end of said tubular housing for rotary movement about an axis extending longitudinally of said tubular housing, said tubular housing of said conveyor being mounted on said carriage for vertical movement, a plaster applying head disposed at an angle to the axis of and carried by said hollow conveyor section and in communication with the other open end of said hollow conveyor section, and means operatively connected to said hollow conveyor section and said conveyor housing for adjusting said hollow conveyor section to any select position of said rotary movement.

4. In a portable plastering machine, a mobile truck, a post fixedly secured to said truck, a horizontally disposed track having one end mounted on said post for sliding movement therealong, means operatively connected to said post and track for effecting the sliding movement of said track to any select position along said post, a carriage positioned on said track and mounted on the latter for sliding movement longitudinally thereof, means operatively connected to said track and carriage for effecting the sliding movement of said carriage to any select position along said track, a crank arm having one end pivot-ally connected to said carriage for vertical swinging movement relative thereto, means operatively connected to said carriage and said arm for positioning the latter in a select position of said vertical swing movement, a screw conveyer including an outlet carried on the other end of said arm, and a plaster applying head carried by said conveyer and in communication with the outlet end thereof.

5. In a portable plastering machine, a mobile truck, a post xedly secured to said truck, a horizontally disposed track having one end mounted on said post for sliding movement therealong, means operatively connected to said post and track for effecting the sliding movement of said track to any select position along said. post, a carriage positioned on said track and mounted on the latter for sliding movement longitudinally thereof, means operatively connected to said track and carriage for effecting the sliding movement of said carriage to any select position along said track, a crank arm having one end pivotal- 1y connected to said carriage for vertical swinging movement relative thereto, means operatively connected to said carriage and said arm for positioning the latter in any select position of said vertical swinging movement, a screw conveyer including an outlet pivotally supported on the other end of said arm, means operatively connected to said screw conveyer and said arm for holding said conveyer in any select position of said pivotal movement, and a plaster applying head carried by said conveyer and in communication with the outlet end thereof.

CHARLES H. STANTON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name l Date 1,040,253 Ray Oct. 1, 1912 1,547,937 Miller July 28, 1925 1,766,419 Wertz June 24, 1930 1,797,438 Morelli Mar. 24, 1931 2,101,895 Boulton Dec. 14, 1937 2,339,893 Urschel Jan. 25, 1944 

